About: http://webisa.webdatacommons.org/169568959

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Between the flange and the lens exists a nut made of soft polymeric plastic, rubber, foam cushion or other similar material, which acts as a cushion to decrease friction between lens and flange and protects the lens from being scratched.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es